tim so nguyen p sao cho p^2=1 va p^4+1 cung la so nguyen to. tra loi so nguyen to thoa man la p=
Tim 4 so nguyen to lien tiep sao cho tong cua 4 so nguyen to do cung la 1 so nguyen to
n>2.CMR NEU N CHIA HET CHO 3 THI N MU 2 TRU 1 VA N MU 2 CONG 1 KO DONG THOI CUNG LA SO NGUYEN TO
tim k
k mu 2 +k khng la so nguyen to
Tim tat ca so nguyen sao cho p + 2 va p + 4 cung la so nguyen to
tim so nguyen to ab co 2 chu so khac nhau sao cho ba cung la 1 so nguyen to va ab - ba la 1 so chinh phuong
tim so nguyen to P sao cho P2+4 va P2-4 cung la nguyen to
a mu 4 cong a mu 2 coong 1 cong the la mot so nguyen to hay ko